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- Newsgroups: comp.sys.m68k
- Path: sparky!uunet!panther!mothost!schbbs!waccvm.corp.mot.com!TMKT76
- From: TMKT76@waccvm.corp.mot.com (Daniel Fusils)
- Subject: Re: CPU/FPU wiring
- Organization: Motorola
- Date: 6 Jan 1993 12:25:38 MST
- Message-ID: <1993Jan6.165832.18756@schbbs.mot.com>
- Sender: news@schbbs.mot.com (Net News)
- Nntp-Posting-Host: waccvm.corp.mot.com
- Lines: 21
-
- >I'm interested to wire a system, which will be put to
- >68000 socket. It should contain a 68882 at 24mzh and
- >a 68010 with half that speed (My memory is 16bit thats
- >why 68010). System should have a 68851 MMU too.
-
- I don't think putting a 68851 with a 68010 is a good idea, since the
- protocole exchanged between a 68020 and the '851 is microcoded.
- Same comments for 68882. Even if you want to stick with a 16 bit memory,
- why don't you put together an '020 + '881 (or '882) + '851 (connected
- in 32 bit mode) and your 16 bit mem using the dynamic bus sizing
- mechanism?
- This stuff is pretty well described in the appnote AN944/D (consult
- your closest Mot rep).
-
- >The problem is to find out enough technical info, so
- >I can make approiate logic to split that FPU on a
- >16bit bus and make it work with 7mzh mother board
- >asynchronously
-
- This is pretty well described in the appnote AN947/D (consult
- your closest Mot rep).
-